Sym GTS 250 Service Manual page 247

O2 sensor heater
10 0135
11 1505
Air Injection solenoid
12 1410
13 0335
Manifold Air Pressure Wiring
14 1205
15 0603
Please recheck by Diagnostic tool.
The CHK LIGHT blinking error message is for reference only! Please use SYM
It is very easy to MISREAD the error message by the blinking check lights, thus
PLEASE USE SYM OFFICIAL DIAGNOSTIC TOOL.
ISC motor
Crank sensor
EEPROM
WARINING!
Diagnostic tool for problem confirmation.
causing wrong diagnostic and repair treatment.
Blinking 4
Long
Blinking 4
Long
Blinking 5
Long
Blinking 6
Long
Blinking 6
Long
No Blinking Long 0
If EEPROM error confirmed, replace ECU.
5 Check O2 sensor heater and wiring.
Short
9 Check ISC motor and wiring.
Short
Check Air Injection solenoid and
4
Short
6 Check Crank sensor and wiring.
Short
Check Manifold Air Pressure
8
Short
Wiring.
0 EEPROM Error.
Short
wiring.